Add changes package

config/content.tex

@@ -1,3 +1,8 @@
+% Changes
+\usepackage[commentmarkup=footnote]{changes}
+\definechangesauthor[name=Jens Grubert, color=Dandelion]{JG}
+\definechangesauthor[name=Seokhee Jeon, color=Red]{SG}
+
 % Images
 \usepackage{graphicx}
 \usepackage{caption}% Point references to the figure not the caption